You may need to delete an account from the application if you no longer use a particular mailbox or intend to replace it in the client.
To delete the current mail account and all its data from the application:
1.From the ☰ MyOffice Mail menu in the upper-right corner of the Main Window, select Account Settings.
2.On the Account Settings tab, select the desired account in the pane on the left.
3.From the Account Actions menu for the account in the left pane, select Remove Account. The Sign out window opens.
4.Clear the Signature, Tags, and Rules and filters check boxes to remove the relevant data from the application.
5.Click the Sign out button.
The account and all of its data, except for the selected data, will be deleted from the application. This will not delete data from the mail server (if you used an IMAP connection).